Search Posts By User Names..

I've been searching trying to find a particular post (maybe a couple of months old). The post had a pic of a walk behind pulling a aerator. I couldn't find it by searching the conventional way, the post was "how to make 3 times as much money" - or something like that.
I think Lawrence Stone posted it, so I tried to search all his posts, but the search pilled up all posts - not just the threads he started.
Thanks, Billy.